<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport"
          content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
    <title>raindrop</title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }

        body, html {
            width: 100%;
            height: 100%;
            background: url("./bg.jpg") no-repeat;
            background-size: 100% 100%;
            overflow: hidden;
        }
    </style>
</head>
<body>
<canvas id="cas"></canvas>
</body>
<script src="./canvas-raindrop.js"></script>
</html>